Question: When was Why's performer's place of birth established as a city?
Context: Document 1: Philadelphia: In 1681, in partial repayment of a debt, Charles II of England granted William Penn a charter for what would become the Pennsylvania colony. Despite the royal charter, Penn bought the land from the local Lenape to be on good terms with the Native Americans and ensure peace for his colony. Penn made a treaty of friendship with Lenape chief Tammany under an elm tree at Shackamaxon, in what is now the city's Fishtown section. Penn named the city Philadelphia, which is Greek for brotherly love (from philos, "love" or "friendship", and adelphos, "brother"). As a Quaker, Penn had experienced religious persecution and wanted his colony to be a place where anyone could worship freely. This tolerance, far more than afforded by most other colonies, led to better relations with the local Native tribes and fostered Philadelphia's rapid growth into America's most important city. Penn planned a city on the Delaware River to serve as a port and place for government. Hoping that Philadelphia would become more like an English rural town instead of a city, Penn laid out roads on a grid plan to keep houses and businesses spread far apart, with areas for gardens and orchards. The city's inhabitants did not follow Penn's plans, as they crowded by the Delaware River, the port, and subdivided and resold their lots. Before Penn left Philadelphia for the last time, he issued the Charter of 1701 establishing it as a city. It became an important trading center, poor at first, but with tolerable living conditions by the 1750s. Benjamin Franklin, a leading citizen, helped improve city services and founded new ones, such as fire protection, a library, and one of the American colonies' first hospitals.
Document 2: Why (Frankie Avalon song): "Why" is a hit song recorded by Frankie Avalon in 1959 that went to No. 1 on the U.S. "Billboard" Hot 100 chart published on the week of December 28, 1959, for the week ending of January 2, 1960, making it the last No. 1 single of the 1950s, and the first No. 1 single of the 1960s at the same time. It also became the first No. 1 single of the 1960s on the "Cashbox magazine" charts. The song was written by Avalon's manager and record producer Robert "Bob" Marcucci and Peter De Angelis. It was Avalon's second and final No. 1 hit.
Document 3: Music of Pennsylvania: Following the American Revolution, Philadelphia became especially renowned for musical development and was the home of the esteemed Alexander Reinagle, John Christopher Moller, Rayner Taylor and Susannah Haswell Rowson. Reinagle became the most influential figure in Philadelphia's musical life, organizing a number of concerts, organizations and musical events. Francis Hopkinson, a signer of the Declaration of Independence, was a notable composer of the period. One of his compositions, "My Days Have Been So Wondrous Free", is well-remembered as the first art song from the United States (though this is disputed); it is, however, lacking in originality and innovation to set it apart from European compositions.
Answer: 1701
Reasoning steps: Why >> performer Answer: Frankie Avalon
Frankie Avalon >> place of birth Answer: Philadelphia
When was Philadelphia established as a city? Answer: 1701